Which of the following is not an alum?(a) covalent alum(b) Potash alum(c) ammonium alum(d) sodium alumI have been asked this question during an interview for a job.My query is from p-Block Elements topic in section p-Block Elements of Chemistry – Class 11

Which of the following is not an alum?(a) covalent alum(b) Potash alum

1.	Which of the following is not an alum?(a) covalent alum(b) Potash alum(c) ammonium alum(d) sodium alumI have been asked this question during an interview for a job.My query is from p-Block Elements topic in section p-Block Elements of Chemistry – Class 11
Answer» Correct option is (a) covalent ALUM To elaborate: K2SO4.Al2(SO4)3.24H2O, Na2SO4.Al2(SO4)3.24H2O, (NH4)2SO4.Al2(SO4)3.24H2O and (NH4)2SO4.Fe2(SO4)3.24H2O are RESPECTIVE chemical FORMULAE of Potash alum, sodium alum, AMMONIUM alum and FERRIC alum.

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